As it has been shown that FcγRIIb expression is increased by the anti-inflammatory cytokine IL-4 [27], we analyzed publicly available microarray data for IL-4 expression in CML patients (GSE13159 and GSE13164, probe set id: 207539_s_at). This evidence concerns the gene FCGR2B and chronic myelogenous leukemia, BCR-ABL1 positive.